Useful Formulas
 
       Most of the spreadsheets accept new data in the fields that need input data. Launch the file and change the appropriate data fields:

ICFM to SCFM   Qs = Qi (Ts / Ti)((Pi - Pv) / Ps)                         (as inlet air temperature goes up...SCFM value goes down)                         (as ambient air pressure goes down...SCFM value goes down)
SCFM to ICFM   Qi = (Qs / ((Pi - Pv) / Ps) / (Ts / Ti)                         (as inlet air temperature goes up...SCFM value goes up)                         (as ambient air pressure goes down...SCFM value goes up)
ACFM to SCFM   (ACFM is known...trying to find equivalent SCFM)
SCFM to ACFM   (SCFM is known...trying to find equivalent ACFM)
pump down time - vacuum (how long will it take to draw a known volume to a certain vacuum level)
volume of chamber - vacuum (how large of a vessel do you need to increase run time by "x" amount)
tank pressurize time - air (how much time will it take to pressurize a vessel)

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